DL44 Trigger + misc upgrades/corrections

Jul 2024: Believe it or not, got around to updating this. I think I have corrected the original scaling issues, I removed the holes that did nothing, and i made the spring hole slightly larger.

I redesigned the trigger mechanism to accommodate an (I think) standard ballpoint pen spring. I didn't modify the trigger itself, just the housing. I also had trouble getting it to fit with the upper receiver, so I removed some material to have it sit slightly lower.

I corrected the pins to be bette